The thermonuclear fusion that occurs in the sun is a process involving?
a)electricity and hydrogen
b)heat and fused nuclei
c)the creation of energy
d)the destruction of energy

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.

Chitin is a chemical component of the cell walls